“
I purchased these earphones a couple of weeks ago and have had the urge to write a review. However, I needed too make sure that they were fully "burned" and used in different environments to see how they performed before taking the plunge.
This is my first ever headphone review, so please bear with me - I can't say that I know all the right terms or generate scientific diagrams and...” --mcook1970

First custom earphone in the world with a single 14mm dynamic driver couples with advanced frequency suppression technology (FST).
Frequency Response: 10-20000 Hz
Impedance：16ohms（including cable）
Sensitivity (at 1kHz)：116dB spl (1mW)
Important: Due to the size of the driver, people with small ears may not be able to fit. We would need your ear impressions to check for sizes...